The egg factories I have been in send their layers off for processing into pet food at 18mos-2yrs due to the drop in production.
My early life taught me that 18 mos is roastable but by 2yrs its the stewpot or soup only.
Rotate out 1/4 of your layers every 6mos and you'll stay sustainable. Also the new ones will learn from the adults = less time spent training.
Recycled 5 gal paint / drywall buckets cut like a barrel seat make good free nests. That's ecco too!
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